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| dc.contributor.author | Mekuriachew, Nbret | |
| dc.date.accessioned | 2021-09-17T11:01:10Z | |
| dc.date.available | 2021-09-17T11:01:10Z | |
| dc.date.issued | 2021-07 | |
| dc.identifier.uri | http://ir.bdu.edu.et/handle/123456789/12594 | |
| dc.description.abstract | Railway sleepers are vital components of a rail network infrastructure. They can be manufactured using different engineered materials. Also, using prestressing steel bars to improve capacity in railway sleepers is an emerging trend in railway engineering. This research numerically investigates the use of embedded prestressed steel bars in steel fibre reinforced railway sleepers. The experimental result reported in the literature was used for validation analysis using ANSYS nonlinear finite element analysis software program. And further, the effects of influential variables such as intensity of prestressing forces, the position of steel bars, grades of concrete, size, and the number of bars to get insight into the behaviour of prestressing steel bars in fibre-reinforced prestressed concrete railway sleepers are studied. Finite element analysis (FEA) results indicated an increase in grade of concrete improved Load carrying capacity of sleepers on average 17.75 % for each 10 MPa rise in the grade of concrete. Varying prestressing forces did not show a considerable effect on concrete damage and deflection at failure load. In contrast, changing the number and size of tendons exhibited observable effects on the load-displacement response, maximum stress intensity, deformed shape, and plastic strain. Also, positioning steel bars at the bottom rather than at the top and middle of a sleeper resulted in performance gains for railway sleepers. | en_US |
| dc.language.iso | en_US | en_US |
| dc.subject | CIVIL AND WATER RESOURCE ENGINEERING | en_US |
| dc.title | EFFECTS OF PRESTRESSING STEEL BARS ON THE BEHAVIOR OF FIBRE-REINFORCED CONCRETE RAILWAY SLEEPERS | en_US |
| dc.type | Thesis | en_US |
